Pin motion for folding cylinders



3G a stud 19 carried Patentecl Apr. 12, 1,932

U l'lf ATENT ort-'fins OSCAR CHARLES ROESEN, OF BBOOKLYN, NEW YORK, ASSIGNOE TO WOOD' N EWSPAPER MACHINERY CORPORATION, OF NEW YORK,-N. Y., A

CORPORATGN OF VIRGINIA FIN MOTION FOR FOLDIING CYLINDERS Application filed December 29, 1930. Serial No. 505,274.

The principal object of this invention is to improve the oscillatory motion of the impaling pins on a folding cylinder by which, at the time of engagement with the paper, the pin points present a leading angle with the direck .tion of motion of the paper, while at the point of disengagement, the pin points assume a trailing angle and to provide thismotionin such form that not only is the paper held in the leading angle of the pin but the pins are tilted backward just before Withdrawal of the paper so that the paper slides oif easily and without being torn. i

Reference is to be had to the drawing in which the figure is a transverse cross section of a folding and cutting couple showing a pre- I ferred embodiment of this invention.y

The invention is shown as applied to an ordinary folding couple comprising a fold- 20 ing cylinder 10, a cutting cylinder 11, the cutting-cylinder being provided with the usual cutting blades 12 and recesses 13 and the folding cylinder with cushions 14. The invention relates, however, to the impaling pins.

Atthe ends of the folding cylinder 10 are located concentrically two stationary cams 15. Each one is shown as a face cam in which operate a roll 16. Each roll is mounted on a lever having two arms 17 and 18 pivoted on by the cylinder. Thus as the cylinder rotates the rolls 16y are moved out and in oppositely and the lever 17-18 is oscillated.

In the arm 18 of this lever is a radial slot 20 and within the cylinder is another bell crank 21 having a pin 22 at one end engaging in the slot 20 giving a pivotal lost motion connection between the two levers. A stud 23 is located at the other end of the bell Crank to which a pin holder 24 is pivotally connected. This pin holder is slidably mounted in a diametrical opening shaft or stud 25 mounted in the cylinder. The pin holder carries a pin 26 of the usual construction.

As the cylinder rotates, each one of the cam rolls 16 moves out and in and the resultis to swing each bell crank 21 and thus move each stud 23 on the arc of a circle which is centered at the center of oscillation of the bell through an oscillatableL tive arc of this circle and the location at which the stud 25 is mounted is responsible for the result obtained. i

At the right in Fig. 1 the roll 16 is at its maximum distance from the center of the cylinder, the stud 22 is at its limiting position to the left andL the stucl 23 at its maximum distance to the left or upwardly in this figure. The line between the center of the stud 23 and the center of oscillation of the bell crank crank. The relationship between the effec- I se 21 is practically radial but does not go over the dead center. swung around as far as it will go forward and the pin holder 24 is pushed outwardly. In this way the pin 26 is thrust forward in the direction of rotation of the surface of the cylinder and outwardly into a recess 13 in the folding cylinder making a leading angle. In

coming to this position the pin has come forward and also been projectecl at the same time soas to make only a slight slot inthe paper.

On the left side of the cylinder the roll 16 is drawn in as far as possible and therefore the stud 22 is moved outwardly toward the circumference and the stud 23 inwardly. Obviously this draws the pin on this side inwardly and tilts the stud 25 so that 'the pin 26 makes a trailing angle with the paper. In getting to this position the pin is move not only backwardly in a nearly radial direction but is turned with the stud 25 so as to swing with the paper as the paper is drawn off.

lt will be seen therefore, by comparison of the two positions shown, that advantage is gained by holding the paper on by a leadingI angle of the pin and its engaging the pins not only by withdrawing them but by tilting them backward. The paper slides off easily in the latter position.

It will be seen also that, from the position shown at the right, where the pins impale the paper, to a position just at the folding rolls, which are not shown but are located at the bottom, these pins stay in their forwardly inclined Lprojecting position. They are gradually drawn back and tilted in the other'way from that position to the one shown at the left. They get to the 'po- Therefore the stud 25 is.

sition in which they are tilted at the angle shown at the left after the folding rolls have gripped the sheet and they are withdrawn completely at the same time at which they get to the angle shown.

Although I have illustrated and described only one form of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the .invention as expressed in the claims. Therefore I do not wish to be limited in this respect but What I do claim is 1. In a pin motion for the purpose ldescribed, the combination with a stud having a passage, a pin holder slidably mounted in said passage, and means for simultaneously Swinging the stud on its axis to bring the passage and pin holder to a leading angle and moving the holder outwardly.

2. In a pin motion for the purpose described, the combination Vwith a freely oscil- *latable stud having a diametrical passage ltherethrough, a pinL holder slidably mounted in said passage, and means for simultaneously Swinging the stud on its axis to bring Vthe passage and pin holder to aleading angle and moving the holder outwardly.

3. In a pin motion for the purpose *described, the combination with a stud having a passage, a pin holder slidably mounted in said passage, and means for simultaneously Swinging the stud on its axis to bring the passage and pin holderI to a traling angle and withdrawing the holder.

4. In a pin motion for the purpose described, thecombination with a 'freely oscillatable stud having a diametri'cal passage 'therethroug'ln a pin holder slidably mounted in said passage, and means for simultaneously Swinging the stud on its axis to bring the passage and pin holder to a trailing angle and withdrawing the holder.

5. The combination Lwith a folding cylinder and a stationary caniadjacent thereto, of a lever pivoted on the cylinderand having a cam roll engaging said cam, a Slidably 'oscillatable pin holder, and means for transmitting the motion of said lever-*to the pin holder to swing it to a forward angle With respect to a radial line and move it out'when the cylinder rotates the pin holder to yimpaling position and to swing the holder to a rearward angle and withdraw it when the holder gets to releasing position.

6. The combination with a folding cylinder and a stationary cam adjacent thereto, of a lever pivoted to the cylinder and having a cam roll engaging the cam, a bell crank pivotally connected with the lever and having an arm movable by the lever to a substantially radial position and back to an angular position, and a pin holder slidably and oscillatably mounted in such relative position to the arm that when the arm is in substantially 

